폐동맥 폐쇄, 심실중격 결손, 동맥관 개존 및 심방중격 결손을 동반한 선천성 교정형 대동맥 전위증의 치험

김영학,지행옥,Kim, Yeong-Hak,Ji, Haeng-Ok 대한흉부심장혈관외과학회 1990 Journal of Chest Surgery (J Chest Surg) Vol.23 No.5

Congenitally corrected transposition of the great arteries is a rare congenital heart anomaly, in isolation, has no hemodynamic consequences. It is usually associated with one or more of a variety of intracardiac lesions, ventricular septal defect, valvular or subvalvular pulmonary stenosis, and deformity of the systemic atrioventricular valve with insufficiency. This report describes a successful two stage operation for congenitally corrected transposition, [SLL] type, with ventricular septal defect, pulmonary atresia, persistent ductus arteriosus, and atrial septal defect. A 9 years old patient underwent modified Blalock-Taussig operation because of severe pulmonary hypoplasia. 2 years later a corrective operation, direct closure of ASD and PDA, VSD closure with Dacron patch, Enlargement of left pulmonary artery with pericardial patch and Relief of ROTO with Rastelli procedure could be successfully performed without complication.

새 병원정체성(HI) 도입을 통한 병원경쟁력 제고에 관한 일반연구(3)

김영학,Kim, Yeong-Hak 대한병원협회 1997 대한병원협회지 Vol.26 No.11

지적공부 등록사항 확장 방향성에 관한 연구 - 의무 및 제한사항 등록을 중심으로 -

김영학,박종철,오부환,Kim, Young-Hag,Park, Jong-Cheul,Oh, Bu-Hwan 한국국토정보공사 공간정보연구원 2015 지적과 국토정보 Vol.45 No.2

1910년대 근대적 지적제도가 창설된 이후 100여 년간 새로운 기술의 도입과 사회발전에 따른 요구사항을 수용하기 위한 부분적 보완은 이루어졌지만 지적공부에서 등록 관리하고 있는 등록사항을 확장하기 위한 방향성 설정에 관한 부분에 대해서는 거의 논의가 이루어지지 않았다. 본 논문에서는 국제측량사 연명(FIG) 7분과위원회에서 미래 지적제도 발전방향으로 제시한 지적 2014(Cadastre 2014)의 내용 중 첫번째 선언문의 내용을 바탕으로 현재의 권리 관점의 지적공부 등록사항을 의무 및 제한사항으로 확대하여 등록하는 방안을 제안하였으며, 이에 대한 지적공부 등록사항 확장 방향성으로 법률적 확장성과 지하 및 지상 공간 객체로의 확장에 관한 기술적 확장성, 마지막으로 토지와 관련된 정보 공시를 위한 플랫폼 역할을 기능적 확장성으로 제시하였다. 또한 확장 방향성을 고려하여 지적공부 등록사항 확대를 적용할 수 있는 분야로 환경 분야와 안전관리 분야에 대한 적용을 검토하였다. Since the creation of modern cadastral system in 1910's the cadastral system has been modified to comply with a new technical development and diverse requirements. However, the discussion on the directions for extension of cadastral records has been rarely addressed. In this paper it is proposed that the direction of extension cadastral records from the current a right focused perspective to an obligation and restrictions perspective based on the FIG Commission 7's Cadastre 2014 which is a future vision of cadastral system development. As the extension directions, a legal and technical perspective and functional extension for a role for land information publicity platform has been presented. Considering the extension directions an environment and disaster management field has been reviewed for an applicable fields.

함정의 형상 반자계 효과가 탈자에 미치는 영향

김영학,Kim, Young-Hak 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.2

본 논문은 함정의 형상이 탈자 이후에 함정에 형성되는 수직자화에 미치는 영향에 대해 조사하였다. 선박의 전면 전개도로부터 함정의 형상을 삼각형, 사각형, 원형으로 선택하여 지자계에 의한 수직방향의 유도자화를 FEM 정자장 해석으로 조사하였다. 탈자과정 중에 자화에 의한 자계를 측정하였으며, 탈자 이후 성분분리를 통해 영구자화에 의한 자계의 수평 및 수직성분의 크기를 바이어스 자계의 변화에 따라 조사하였다. 이 실험으로부터 함정의 형상을 고려하는 탈자처리 방법이 필요하며 방법으로 선수와 선미 쪽에 권선 간격을 좁게 하여 함정의 중앙부분보다 비교적 더 큰 자계가 인가되도록 하는 것이 바람직하다는 것을 알았다. This paper studied on the influence of naval vessel shape on vertical magnetic field after the vessel was demagnetized. The triangular shape, the rectangular shape and circular shape were adaped from vessel's structual drawings. Magneto-static FEM analysis was performed to obtain the iduced magnetic field due to earth magnetic field for those shapes. During demagnetization process, magnetic field of residual magnetization was observed. The holizontal and vertical magnetic field were calculated depending on vertical bias magnetic field through magnetc component seperation. To demagnetize naval vessel ship, demagnetizing coils shoud be wound more finely in the vow and stern of the ship than it should be in the mid-part of the ship.

개심술에서 St. Thomas Hospital 심정지액의 심근보호효과에 관한 임상적 연구

김영학,김근호,Kim, Yeong-Hak,Kim, Geun-Ho 대한흉부심장혈관외과학회 1989 Journal of Chest Surgery (J Chest Surg) Vol.22 No.2

Cardioplegia and myocardial protection were performed under cardiopulmonary bypass during open heart surgery with the use of St. Thomas Hospital cardioplegic solution [4 [C] for the coronary artery perfusion and normal saline solution [4[ c] for the topical cardiac cooling. To maintain the state of myocardial protection, coronary artery reperfusion was carried out using St. Thomas Hospital cardioplegic solution at the interval of 30 minutes. A total number of patients studied were 57 cases, including 37 cases of correction for congenital anomalies and 20 cases for acquired heart diseases. Cardiopulmonary bypass time during the surgery was observed to be average of 87.89*47.55 hours, aortic cross-clamping time [ACCT] to be average of 76.68*44.27 hours raging from 30 to 191 minutes. In order to evaluate the effects of myocardial protection in the surgery, serum enzyme levels were determined. To observe the relationship between ACCT and myocardial protection effects, patients studied were divided into the following 3 groups. I group: ACCT 60 minutes, II group: ACCT 90 minutes, III group: ACCT over 91 minutes [1] SGOT; The positive value [increased over 200 units] for ischemic myocardial injury during operation was observed in 11 cases [19.3% of the total] of the total patients studied, of which 4 cases [13.3%] in I group, 1 case [10.0%] in II group, and 6 cases [35.3%] in III group. [2] LDH; The positive value [increased over 900 units] for ischemic myocardial injury during operation was observed in 9 cases [15.7% of the total] of the total patients studied, of which 2 cases [6.6%] in I group, 1 case [10.0%] in II group and 6 cases [35.3%] in III group. [3] CPK; The positive value [increased over 800 units] for ischemic myocardial injury during operation was observed in 10 cases [17.5% of the total] of the total patients studied, including 4 cases [13.3%] in I group, 1 case [10.0%] in II group, and 5 cases [29.4%] in III group [4] The myocardial protection method used in the present study was demonstrated to be effective for the myocardial protection in the surgery with ACCT of up to 90 minutes. A few ischemic myocardial injury were observed in the surgery with ACCT over 91 minutes, but no significant cardiac dysfunction was noted. The surgery with ACCT of up to 191 minutes did not appear to give rise any significant interference with postoperative recovery.

새 병원정체성(HI) 도입을 통한 병원경쟁력 제고에 관한 일반연구(1)

김영학,Kim, Yeong-Hak 대한병원협회 1997 대한병원협회지 Vol.26 No.9

비히스테리자화에 의한 강관의 탈자 기법 연구

김영학,양창섭,신광호,Kim, Young-Hak,Yang, Chang-Seob,Shin, Kwang-Ho 한국군사과학기술학회 2009 한국군사과학기술학회지 Vol.12 No.1

In this study, we investigated whether the anhysteretic demagnetization process would be applicable to remove a complicated magnetization of a steel tube as a part of the experimental earlier study for a deperming of naval vessel. The magnetic tube used in this study was a 10cm-long and 1cm-diameter steel tube, and magnetized with a E-shape ferrite core to form a nonuniform magnetization in it. In the anhysteretic demagnetization process, a dc magnetic field applied along the longitudinal direction of the tube decreased from ${\pm}$3kA/m to zero-field with the step of ${\pm}$300A/m. At the same time, an ac bias magnetic field with the frequency of 60Hz and the field intensity of 300A/m was excited along the circumstantial direction of the tube. It was found that the anhysteretic process was useful to demagnetize a small-object like a steel tube from the experimental results showing the residual magnetization reduced over 90%.

함정에서 발생하는 자계신호의 성분분리에 대한 검토

김영학,도재원,Kim, Young-Hak,Doh, JaeWon 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.8

함정의 탈자결과 평가를 위한 자계신호의 분리방법에 대한 이론적 근거와 해저 면에 설치되는 사각코일로부터 발생하는 불균일한 자계가 분리결과에 미치는 영향을 측정 신호와 FEM해석을 통해 검토하였다. 측정신호는 제작된 모델함에서 발생하는 자계를 자계센서로 측정한 것이며 FEM 계산은 제작된 모델함과 동일한 형상으로 수행되었다. ILM(induced longitudinal magnetization) 신호와 IVM(induced vertical magnetization) 신호는 함정이 가지는 투자율과 지자계의 수평과 수직방향 성분에 의해 각각 발생하는 자화에 의한 것이며, PLM(permanent longitudinal magnetization) 신호와 PVM(permanent vertical magnetization) 신호는 함정의 영구자화의 수평성분과 수직성분에 의한 것임이 확인되었다. 또한 사각 코일의 수직방향의 자계는 균일한 지자계를 완전히 상쇄할 수 없어 사각코일의 면적에 가까운 크기를 가지는 함정 일수록 사각코일의 자계 불균일성의 영향을 크게 받게 됨을 알았다. This paper investigated the separation of magnetic signal from a ferro-magnetic object. The magnetic signals were ILM(induced longitudinal magnetization) and IVM(induced vertical magnetization), which were induced by earth magnetic field and PLM(permanent longitudinal magnetization) and PVM(permanent vertical magnetization), which were due to a permanent magnetization of the object, respectively. Magnetic signal separation was based on the fact that magnetization vector could be analyzed according to longitudinal and vertical directions. Also the influence of non-uniform magnetic field from a rectangular coil on the separation was examined. A military vessel with a size close to rectangular coil has more errors on the magnetic signal separation.

명화 속의 책 이미지 (2) - "책거리" 민화

김영학,Kim, Yeong-Hak 대한출판문화협회 1995 출판저널 Vol.163 No.-

자성와이어를 이용한 동축케이블형 자계센서의 특성

김영학,Kim, Y.H. 한국자기학회 2007 韓國磁氣學會誌 Vol.17 No.2

본 논문에서는 Co를 주성분으로 하는 아몰퍼스 자성 와이어를 동축케이블의 신호선으로 하는 자계센서를 제작하여 외부자계에 대한 특성을 측정하였다. 측정된 임피던스의 주파수의존성에는 전송선로의 공진특성이 반영되었으며 인가자계가 없을 때, 1/4 파장에 해당하는 주파수가 250 MHz에서 나타났다. 측정 주파수대역에서는 표피효과에 의한 저항성분이 임피던스를 거의 결정하였으며 또한 외부자계가 $0\;Oe{\sim}1\;Oe$ 사이에서 임피던스는 자성 아몰퍼스와이어의 투자율의 변화에 의해 크게 변화하였다. 0.1 Oe 부근에서 150 MHz의 ${\Delta}Z/{\Delta}H$가 $300{\Omega}/Oe$이라는 매우 큰 값이 얻어져 Co를 주성분으로 하는 자성와이어를 동축케이블형 자계센서로 사용하는 경우 센서로서 매우 유용함을 알 수 있었다. Co-based amorphous magnetic wire with a diameter of $125{\mu}m$ and a length of 40 mm was used as an inner conductor of a coaxial cable to construct a magnetic sensor. Sensor characteristics was measured up to 3 GHz with applied up to 60 Oe by using network analyzer. Frequency dependence of impedance for this sensor was very close to the impedance resonant pattern of transmission line and 250 MHz was obtained as a 1/4 wavelength without external magnetic field. Large impedance change was measured in the magnetic field range between 0 Oe and 1 Oe, which was influenced by permeability change of magnetic amorphous wire. Because ${\Delta}Z/{\Delta}H$ value of $300{\Omega}/Oe$ was obtained at 0.1 Oe, this coaxial cable with amorphous wire can be useful as a magnetic sensor.